大家好.

[a260881071]

 WebClient wc = new WebClient();
            wc.Encoding = System.Text.Encoding.UTF8;
            string strUrl;
            if (context.Request.Cookies["lang"] != null && context.Request.Cookies["lang"].Value == "en-us")
                strUrl = "http://maps.googleapis.com/maps/api/geocode/json?latlng=" + lat + "," + lon + "&sensor=false";
            else
                strUrl = "http://maps.googleapis.com/maps/api/geocode/json?latlng=" + lat + "," + lon + "&sensor=false&language=zh-CN";
            try
            {
                string jsonStr = wc.DownloadString(strUrl);//执行时间过长
                int begin = jsonStr.IndexOf("formatted_address");
                if (begin < 0) return "";
                int end = jsonStr.IndexOf("geometry");
                return jsonStr.Substring(begin + 22, end - begin - 35);
            }
            catch
            {
                return "";
            }

如果判断执行时间过长的那行代码,比如三到五秒钟仍然没有返回结果的就直接返回空.

[宝_爸]

public class MyWebClient: WebClient
{
   //time in milliseconds
    private int timeout;
   public int Timeout
   {
           get {
               return timeout;
           }
           set {
               timeout = value;
           }
    }

    public MyWebClient()
    {
           this.timeout = 60000;
    }

     public MyWebClient(int timeout)
    {
           this.timeout = timeout;
    }

    protected override WebRequest GetWebRequest(Uri address)
     {
           var result = base.GetWebRequest(address);
           result.Timeout = this.timeout;
           return result;
    }
}

代码来自下面文章 http://w3ka.blogspot.com.au/2009/12/how-to-fix-webclient-timeout-issue.html